只能用that作为定语从句的关系代词的情况
(a) 在there be 句型中,只用that,不用which。
(b) 在不定代词,如:anything, nothing, the one, all, much, few, any, little等作先行词时,只用that,不用which。
(c) 先行词有the only, the very,the same,the last,just修饰时,只用that。
(d) 先行词为序数词、数词、形容词最高级时,只用that。.
(e) 先行词既有人,又有物时。
(f) 先行词指物,在主句中作表语时.
(g) 为了避免重复.
(h)先行词是the way时
举例:
Is this the book that you borrowed in the library?
这是你在图书馆借的那本书吗?
Who that break the window should be punished.
谁打碎了窗户都要受到惩罚.
All that is needed is a supply of oil.
所需的只是供油问题。
Finally, the thier handed everything that he had stolen to the police.
那贼最终把偷的全部东西交给了警察。
百度一搜就出来啦,不用问别人,有问题找百度